syzkaller login: [ 39.275119] BUG: Bad rss-counter state mm:00000000e81dbc57 type:MM_FILEPAGES val:33 [ 39.277086] BUG: Bad rss-counter state mm:00000000e81dbc57 type:MM_ANONPAGES val:22 [ 39.440090] ================================================================== [ 39.441038] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.442027] Read of size 8 at addr ffff88800e734140 by task sshd/219 [ 39.442818] [ 39.443094] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.444088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.445091] Call Trace: [ 39.445441] [ 39.445727] dump_stack_lvl+0x91/0xf0 [ 39.446248] print_report+0xcc/0x620 [ 39.446744] ? __virt_addr_valid+0x102/0x340 [ 39.447302] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.447941] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.448632] kasan_report+0xbe/0xf0 [ 39.449138] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.449823] vma_interval_tree_remove+0xc75/0xec0 [ 39.450434] vma_prepare+0xc54/0x11a0 [ 39.450912] __split_vma+0x5af/0x950 [ 39.451396] ? __pfx___split_vma+0x10/0x10 [ 39.451925] ? find_held_lock+0x2c/0x110 [ 39.452474] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.453059] ? lock_is_held_type+0x9f/0x120 [ 39.453602] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.454252] ? mtree_range_walk+0x632/0x900 [ 39.454811] ? mas_walk+0x5c7/0x7c0 [ 39.455289] do_vmi_munmap+0x1f1/0x2b0 [ 39.455775] mmap_region+0x1f9/0x2660 [ 39.456277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.456783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.457500] ? __pfx_lock_acquire+0x10/0x10 [ 39.458044] ? __pfx_mmap_region+0x10/0x10 [ 39.458573] ? security_mmap_addr+0x7d/0xa0 [ 39.459108] ? get_unmapped_area+0x1f5/0x3f0 [ 39.459655] do_mmap+0x854/0xf00 [ 39.460122] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.460612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.461180] ksys_mmap_pgoff+0x3af/0x500 [ 39.461683] do_syscall_64+0x3f/0x90 [ 39.462168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.462802] RIP: 0033:0x7f0292d4ed82 [ 39.463289] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 39.465424] RSP: 002b:00007ffc45550638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.466330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0292d4ed82 [ 39.467179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0292188000 [ 39.468123] RBP: 00007f0292188000 R08: 0000000000000009 R09: 0000000000001000 [ 39.469032] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d34023cec0 [ 39.469915] R13: 00007ffc45550650 R14: 00007ffc45550680 R15: 00007ffc455509e0 [ 39.470805] [ 39.471124] [ 39.471350] Allocated by task 212: [ 39.471796] kasan_save_stack+0x22/0x50 [ 39.472366] kasan_set_track+0x25/0x30 [ 39.472878] __kasan_slab_alloc+0x59/0x70 [ 39.473446] kmem_cache_alloc+0x16b/0x370 [ 39.473992] vm_area_dup+0x20/0x160 [ 39.474472] __split_vma+0x170/0x950 [ 39.474954] split_vma+0xc6/0x110 [ 39.475427] mprotect_fixup+0x8d2/0xb30 [ 39.475950] do_mprotect_pkey+0x87e/0xd40 [ 39.476517] __x64_sys_mprotect+0x78/0xc0 [ 39.477077] do_syscall_64+0x3f/0x90 [ 39.477558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.478246] [ 39.478472] Freed by task 212: [ 39.478875] kasan_save_stack+0x22/0x50 [ 39.479409] kasan_set_track+0x25/0x30 [ 39.479920] kasan_save_free_info+0x2b/0x50 [ 39.480513] __kasan_slab_free+0x10a/0x190 [ 39.481078] kmem_cache_free+0x10d/0x4d0 [ 39.481606] rcu_core+0x8c8/0x2860 [ 39.482082] __do_softirq+0x1b7/0x7d4 [ 39.482581] [ 39.482806] Last potentially related work creation: [ 39.483440] kasan_save_stack+0x22/0x50 [ 39.483967] __kasan_record_aux_stack+0x8e/0xa0 [ 39.484578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.485250] remove_vma+0x139/0x170 [ 39.485724] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.486313] do_vmi_munmap+0x1f1/0x2b0 [ 39.486813] __vm_munmap+0x138/0x3a0 [ 39.487303] __x64_sys_munmap+0x59/0x80 [ 39.487820] do_syscall_64+0x3f/0x90 [ 39.488357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.489036] [ 39.489254] Second to last potentially related work creation: [ 39.489965] kasan_save_stack+0x22/0x50 [ 39.490492] __kasan_record_aux_stack+0x8e/0xa0 [ 39.491095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.491762] remove_vma+0x139/0x170 [ 39.492269] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.492846] do_vmi_munmap+0x1f1/0x2b0 [ 39.493375] mmap_region+0x1f9/0x2660 [ 39.493869] do_mmap+0x854/0xf00 [ 39.494328] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.494839] ksys_mmap_pgoff+0x3af/0x500 [ 39.495369] do_syscall_64+0x3f/0x90 [ 39.495862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.496547] [ 39.496768] The buggy address belongs to the object at ffff88800e7340e8 [ 39.496768] which belongs to the cache vm_area_struct of size 168 [ 39.498333] The buggy address is located 88 bytes inside of [ 39.498333] freed 168-byte region [ffff88800e7340e8, ffff88800e734190) [ 39.499796] [ 39.500051] The buggy address belongs to the physical page: [ 39.500733] page:00000000a33ee1b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe734 [ 39.501868] memcg:ffff88800e583801 [ 39.502322] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.503071] page_type: 0xffffffff() [ 39.503541] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.504528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e583801 [ 39.505483] page dumped because: kasan: bad access detected [ 39.506186] [ 39.506403] Memory state around the buggy address: [ 39.507013] ffff88800e734000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.507896] ffff88800e734080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.508811] >ffff88800e734100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.509704] ^ [ 39.510374] ffff88800e734180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.511282] ffff88800e734200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.512188] ================================================================== [ 39.513336] Disabling lock debugging due to kernel taint [ 41.934692] BUG: Bad rss-counter state mm:00000000c7ba5244 type:MM_FILEPAGES val:33 [ 41.936075] BUG: Bad rss-counter state mm:00000000c7ba5244 type:MM_ANONPAGES val:22 [ 42.416851] BUG: Bad rss-counter state mm:000000000663c916 type:MM_FILEPAGES val:33 [ 42.417879] BUG: Bad rss-counter state mm:000000000663c916 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14300' (ECDSA) to the list of known hosts. 2023/06/20 07:56:18 fuzzer started 2023/06/20 07:56:19 dialing manager at localhost:44161 2023/06/20 07:56:19 checking machine... 2023/06/20 07:56:19 checking revisions... [ 43.174626] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:56:19 testing simple program... [ 43.229031] cgroup: Unknown subsys name 'net' [ 43.267648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007faee56c2a30 CR3=000000000964c000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=982bfd9eae0fa0a8ef48cb5de1ea1902 XMM02=000000000011d558ec2efd57dc4c00df XMM03=0000000000123ef869a85b8776abb2d2 XMM04=f46e1d8aa9fbcc8500000000000ae988 XMM05=19e9129bd510f2350000000000134a80 XMM06=9d0d8a2bf7fd2efa0000000000133c58 XMM07=e042d86d42eb936e00000000001241d0 XMM08=69a85b8776abb2d2000000000011d5b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9bd8cdc618 CR3=0000000009940000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2038313a36353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a36353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000